From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet. “I was like, ‘OK, I'm pretty sure that ...

Scientists say caves on Mars and icy moons may host microbial life and serve as future habitats for astronauts to be sent to ...

Fluorescent caves deep below America show how alien life could exist on one of Jupiter's moons, say scientists. The chemistry in Wind Cave, South Dakota, means that, under an ultraviolet (UV) light, ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

An ancient Martian system of canyons and valleys could be home to archaic life forms, a ground-breaking scientific paper has found. Scientists investigating the Red Planet’s mind-boggling cave system ...